http://www.cebik.com/
http://www.qsl.net/d/dk7zb/
http://www.astrosurf.com/luxorion/qsl-antenna.htm
http://www.w8ji.com/antennas.htm
http://www.qsl.net/dk7zb/start1.htm
http://www.ac6v.com/antprojects.htm
http://www.i1wqrlinkradio.com/
http://members.fortunecity.com/xe1bef/theory-antennas.htm
